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Tips To Protect Linux Servers Physical Console Access

This is an user contributed article.

Linux computer console is a physical device to operate a computer / server. Here are few steps which, if taken, make it more difficult for an attacker to quickly modify a system from its console.
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Howto Upgrade Debian 4 Etch to Debian 5.0 Lenny

Debian version 5.0 has been released. It is recommended that you upgrade the system to latest version. Upgrading remote Debian server is a piece of cake. In this tutorial, you will learn about upgrading Debian Linux server from Etch to Lenny over ssh session.
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Download Debian Linux 5 Lenny ISO / CD / DVD Images

Debian GNU/Linux version 5.0 has been released ( jump to download ) after 22 months of constant development and available for download in various media format. Debian GNU/Linux is a free operating system which supports a total of twelve processor architectures and includes the KDE, GNOME, Xfce, and LXDE desktop environments. It also features compatibility with the FHS v2.3 and software developed for version 3.2 of the LSB.

Update: There is a newer software of this software available:
Download Debian Linux 7 Lenny ISO / CD / DVD Images

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Linus Torvalds Switched Back To Gnome

Linus Torvalds, Linux's creator, dislikes the GNOME desktop. There was a big flame war(s) between Linus Torvalds and the GNOME community. At one point he claimed that - "Gnome seems to be developed by interface Nazis and that its developers believe their users are idiots". And guess what? Who made the switch to Gnome?
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Linux Convert ext3 to ext4 File system

Some time ago ext4 was released and available for Linux kernel. ext4 provides some additional benefits and perforce over ext3 file system. You can easily convert ext3 to ext4 file system. The next release of Fedora, 11, will default to the ext4 file system unless serious regressions are seen. In this quick tutorial you will learn about converting ext3 to ext4 file system.
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VMWare ESX4 and ESX3.5: SCSI timeout For Linux Guest

Recently, I noticed that the timeout values differ on CentOS v5.x and RHEL Linux 5.x guests on VMWare ESX4 and ESX3.5. I've notices that older ESX 3.5 set a 60 secs timeout and ESX4.x set to 180 secs. Luckly you can fix it easily:
Edit /etc/udev/rules.d/99-vmware-scsi-udev.rules,
# vi /etc/udev/rules.d/99-vmware-scsi-udev.rules
Sample config:

RUN+="/bin/sh -c 'echo 180 >/sys$DEVPATH/device/timeout'"

Find timeout value (180) and change it as per your requirements. Make sure you install the vmware-tools RPM.

Top 10 Linux Virtualization Software

Virtualization is the latest buzz word. You may wonder computers are getting cheaper every day, why should I care and why should I use virtualization? Virtualization is a broad term that refers to the abstraction of computer resources such as:

  1. Platform Virtualization
  2. Resource Virtualization
  3. Storage Virtualization
  4. Network Virtualization
  5. Desktop Virtualization

This article describes why you need virtualization and list commonly used FOSS and proprietary Linux virtualization software.
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